Google Sound Search

Android Jelly Bean comes with a Google widget that lets you find the name of a song you're listening to. Just like Shazam or SoundHound, except that the widget links to Google Play, so you can quickly buy the song if you're in the US.

The widget's name is Sound Search, but the most prominent message you're likely to see when using the widget is "What's this song?". The internal codename for the app seems to be "Google Ears".

Here's the Sound Search widget in action:

Hopefully, Google will release Sound Search as a standalone app or integrate it with Google Play Music and the Voice Search app.